Process for producing vat dyestufs of the anthraquinone acridine series



'atentcl Sept, 20, 1932 UNITED! STATES JPME' T E LCQE- HEINRICH NERESHEIMER, or nnnwresimrnnoni'rnrtnnmuirinnsrfnonoignrior FBANKFOBT-ON-THE-MAIN-FECHENHEIM, GEORGBG'HNER; or" immunoas- FELID, GERMANY, nssrenons TO GENERAL 'ANIIJINE WORK-Q N. Y., A CORPORATION OF DELAWARE mg, on NEW YORK I PROCESS FOR rnonucme VAT mznsrvrrs or THE anrnaaouinoim AGRIDINE SERIES No Drawing. Application filed June 9,

In'the copending application filed on the same date by Heinrich Neresheimer and Ernst Honold new vat dyestufis are described corresponding to the probable general formula:

Yl' (1) EN 3- Y O Y wherein one Y means the group NH-acyl and A the other Ys mean hydrogen and the ben-; 7

[allowing nitrogen tov pass through,- 2( ,p artsebo zanthronyl residue may contain halogen atoms, and obtained by the action of an acylating agent on the reaction products of an alkaline acting agent on bz-l-benzanthronyl-lamino-lor -5- or 0 compounds.

Now we have found that so far as'the acyl I group belongs to the aromatic series the same and analogues dyestuffs are obtained when starting from bz-l-benzanthronyl-l-aminoaroylamino-anthraquinone compounds, containing already the aroylamino-grou'p in their molecule and corresponding probably to gr the general formula:

r If. 0 EN wherein one X means the group p rts b i g by -8-aminoanthraqu1none I is kept at about 1930, Serial No. 460,089, and in Germany Augustz30, 1929.

only a condensation, but also a,..saponifica- 4 tion of the arc llami'no g'roup takes place;

In order'td furthereillustrate our invention, the following examples are given, the

eig t. an ria emp r tures in :centigrade -degrees -abut we; wish it toigbe Qunderstood that our invention is not limited to the examples ,-given,--nor toithe exactbonditions statedthereinzm l I 2410 {At s'ilitien bf so pmsgdr sodiunianiline in ;310p arts of anhydrous aniline is heated to about 1 and at: ,this temperature lwhile condensing bz-eI-brombenzanthrone w th .1-

Ia'iniijof5 benzoylamino1anthraquinone. The

mass is kept 'at this' temperature until noiuna'm changed;starting'rmaterial is present; When adenine inassgis poured ontan fexcess of dilute hydrochloricacid:and .the separated dyestuff is filteredbfinnd waslfed'out with water. Whendry, it represents a dark powdery"; soluble in concentrated sulfuric acid with a een color and dyeing cotton from a bluish violet vat fast yellowish olive shades. The dyestufl is practically identical with the dyestuff of Exailnlple 1 of the copending applica iflo tion filedby einrich Neresheimer and Ernst Honold. V I

When using bz-l-benzanthronyl-l-amino- 4- or -8-benzoylamino-anthraquinone as starting material, condensation products of very similar character are obtained.

Emample 2 parts of anhydrous aniline, 11.5Iparts V I of sodium metaland a quantity of anhydrousi alcohol sufiicient for forming the alcoholate, are heated in an apparatus provided with a reflux condenser, while allowing nitrogen to pass through, until all of sodium metal is converted into the alcoholate. Then 5 parts of bz-l-benzanthronyl-l-amino-5-benzoylamino-anthraquinone are added and the mixture 170, untilno unchanged detected. When cool, I

initial product can be the-reaction mass is Worked up as describe subjecting bz 7 l-b "lected from th .sponding probably to the general formula:

wherein one X means the group and the other Xs mean hydrogen, to the action of an alkaline condensing agent, which is practically free from hydroxyl-groups see group consisting of alkali metal salts of aromatic amines and of alcoholates.

2. A process for producing a Vat dyestuif of the anthraquinone series which comprises enzanthronyl-1-amino-5 benzoylamino-anthraquinone to the action of an alkaline condensing agent, which is practically free from hydroxyl-groups selected from the group consisting of alkali metal salts of aromatic amines and of alcoholates.

In testimony whereof, we afiix our signa tures.

HEINRICH N ERESHEIMER. ERNST 'HON OLD.

5 GEORG BCHNER.

producing vat dyestuffs i 

